EP 3402616 B1 20231018 - STRAIGHTENING PRESS AND METHOD FOR STRAIGHTENING CONCENTRICITY OR STRAIGHTNESS ERRORS IN ELONGATED WORK PIECES HAVING AT LEAST ONE COIL REGION, SUCH AS IN SCREW CONVEYORS, IN PARTICULAR EXTRUDER SCREWS
Title (en)
STRAIGHTENING PRESS AND METHOD FOR STRAIGHTENING CONCENTRICITY OR STRAIGHTNESS ERRORS IN ELONGATED WORK PIECES HAVING AT LEAST ONE COIL REGION, SUCH AS IN SCREW CONVEYORS, IN PARTICULAR EXTRUDER SCREWS
Title (de)
RICHTPRESSE UND VERFAHREN ZUM RICHTEN VON RUNDLAUF- ODER GERADHEITSFEHLERN AN LANG GESTRECKTEN WERKSTÜCKEN MIT MINDESTENS EINEM WENDELBEREICH, WIE AN FÖRDERSCHNECKEN, INSBESONDERE AN EXTRUDERSCHNECKEN
Title (fr)
PRESSE À DRESSER ET PROCÉDÉ DE DRESSAGE DE FAUX-RONDS OU DE DÉFAUTS DE RECTITUDE SUR DES PIÈCES DE FORME ALLONGÉE COMPORTANT AU MOINS UNE ZONE SPIRALÉE, COMME UNE VIS SANS FIN TRANSPORTEUSE, NOTAMMENT UNE VIS SANS FIN D'EXTRUDEUSE
Publication
Application
Priority
- DE 202016000094 U 20160112
- DE 202016000142 U 20160113
- EP 2017000032 W 20170112
Abstract (en)
[origin: WO2017121640A1] The invention relates to a straightening press (20) for straightening concentricity or straightness errors in elongated work pieces, comprising centring means (21A, 21B) and a work piece (1) clamped between the centring means and having at least one coil region (W1, W2, W3) defining at least one core diameter (Di) and at least one outer diameter (Da) of the work piece and with a coil (2), such as a screw conveyor, in particular an extruder screw. The straightening press also comprises at least one measuring head detecting concentricity errors of the work piece (1). According to the invention, in order to eliminate concentricity errors in extruder coils and other elongated work pieces provided with outer coils, a guide rail (30) arranged approximately parallel to the axis of the work piece (1) clamped between the centring points (21A, 21B) is provided, and the at least one measuring head (10) has means (32; 32A, 32B) for the movement thereof along the guide rail (30), and the at least one measuring head (10) and/or the moving means (32; 32A, 32B) thereof has at least one control means (40; 40A, 40B) configured for maintaining a fixed distance (x) between the coil (2) and the measuring point on the work piece core (1A) during the rotation thereof.
IPC 8 full level
B21D 3/10 (2006.01); B21D 3/16 (2006.01); G01B 5/10 (2006.01)
CPC (source: EP)
B21D 3/10 (2013.01); B21D 3/16 (2013.01); G01B 5/285 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2017121640 A1 20170720; EP 3402616 A1 20181121; EP 3402616 B1 20231018
DOCDB simple family (application)
EP 2017000032 W 20170112; EP 17701028 A 20170112